dddAFPlayer app for iPhone and iPad

(1) dddAFPlayer eliminates fundamental weak point of listening to music with earphones by "loudness control" and "cross feed effect".
(2) Correct "Difference in frequency characteristics of hearing due to difference in sound pressure" based on international standards(ISO226:2003) (Loudness Control).
You can listen to music that is balanced between treble and bass. You can listen to the fundamental tone of all musical instrument.
(3) Correct the "difference in sound transmission method between the speaker and the earphone" and spread the sound image localization to the outside of the head (Crossfeed Effect).
You can feel "the spread of the sound". You can enjoy "the music not tired to listen".
(4) Added "powerful audio signal processing (DSP)". But it not used reverb or echo.
(5) Does not need "the complicated operation and adjustment". Only for "iPhone and attached EarPods combination" dedicated.
(6) It will continue playing in "Background Mode" and "Sleep Mode".
(7) In during playback, the DSP continuously processes a large amount of calculations.
On the interrupt processing, it may cause discontinuities or disturbances in sound.
(8)Play Audio File of "Media Library" in iPhone.
The file format of "AIFF, AIFC, WAV, AAC, MP3" was verified that works. Protected files can not be played.